Jan Krajník graduated from the Prague Conservatory where he studied with professor Jiří Jirmal and Professor Zdeněk Baštinka. He graduated from Huso's Faculty of Theology, where he earned the title of Magistrate of Theology and founded the soul-rock band Mandragora, where he still works. Jan Krajník builds music on the long-term experience of a teacher at a music school where he meets beginners and advanced guitarists. Simply blues is an album of proven and accessible pieces designed for both beginner guitarists and experienced players. The compositions do not contain barrage or complicated procedures, yet they are pleasant with their fresh melody and natural harmony. Guitar labels can be played not only in solo, but also in multiple guitar sets and complementary with other voices, improvisation, fine rhythm, bass, or double bass.